LAC-1 single axis controller manual

SMAC
LAC-1 Technical Reference Manual
The (CH) command causes the following interpretation of the inputs and outputs:
• A HIGH output is considered to be ON (e.g., Channel On ÒCNÓ command).
• A LOW output is considered to be OFF (e.g., Channel Off ÒCFÓ command).
• A HIGH input is considered to be ON (e.g., Do If On ÒDNÓ command).
• A LOW input is considered to be OFF (e.g., Do If Off ÒDFÓ command).
The (CL) command causes the following interpretation of the inputs and outputs:
• A HIGH output is considered to be OFF (e.g., Channel Off ÒCFÓ command).
• A LOW output is considered to be ON (e.g., Channel On ÒCNÓ command).
• A HIGH input is considered to be OFF (e.g., Do If Off ÒDFÓ command).
• A LOW input is considered to be ON (e.g., Do If On ÒDNÓ command).
Input Voltage ÒCHÓ ÒCLÓ Output ÒCHÓ ÒCLÓ
Voltage
HIGH ON OFF HIGH ON OFF
LOW OFF ON LOW OFF ON
Table 2. I/O States.
Another feature of the digital input system is the ability for software input debouncing. All of
the general purpose digital inputs are automatically sampled once every millisecond. Depending
on the debounce delay set by the Input Debounce (ID) command, a given input must remain in the
same state during one or more samplings before it is considered valid. If an input were to be found
in a changed state during a sampling, the input would become invalid and the debounce delay
would be restarted. If no or "0" debounce delay is used, then no input debouncing is performed. For
example: if a "ID5" command has been issued, then a given input must remain in the same state
for 5 samplings or for 5 milliseconds before it is considered valid and the change is detectable.
1.2.5 I/O Technical Specifications
1.2.5.1 General Purpose I/O Nominal Specifications.
Symbo
l
V IH
V IL
V OH
V OL
I IN
Parameter Conditions Typ. Units
Minimum High
Level Input Voltage
Maximum Low
Level Input Voltage
Minimum High
Level Output
Voltage
Maximum Low
Level Output
Voltage
Maximum Input
Current
2.0 V
0.8 V
|I OUT |